Biological Feedback

Some people do not believe the Weigh Down teaching that there is biological feedback or that there is a dependable feedback mechanism, so they think you must follow food rules. Never mind that all—all—the animals know exactly what to eat! Each species eats the same things. They are geniuses, huh? Why do we question this instinct in mankind? Have we no instincts programmed by God? But think again. Do you measure the amount of oxygen your body needs? Do you not instinctively walk out of a room filled with smoke because it bothers you? You breathe deeply when you finally get out into fresh air. Your body will cause you to sneeze when you breathe air filled with car fumes or even too much perfume. The amount of oxygen you need is directly proportional (one-to-one ratio) to the amount of glucose (broken-down food) you require, as illustrated in the Krebs cycle. Why would God give you the ability to measure the exact oxygen you need but not the glucose?